Panel



FIG. 1 shows a left end view of my design for a panel;

FIG. 2 shows a right end view thereof;

FIG. 3 shows a top view thereof;

FIG. 4 shows a bottom view thereof;

FIG. 5 shows a front view thereof; and,

FIG. 6 shows a back view thereof. 

The ornamental design for a panel, as shown and described. 